Learn FIBER with Real Code Examples

Fiber provides routing, middleware, and templating for building web apps and RESTful APIs.

It is lightweight and optimized for speed using Go’s net/http under the hood.

Supports middleware stacking and dependency injection patterns.

Ideal for microservices, high-performance APIs, and real-time applications.

Cross-platform and compatible with Go’s ecosystem and tooling.

Routing with parameters, wildcards, and groups

Middleware stack for logging, auth, and CORS

Static file serving

Template rendering (Go templates, Handlebars, etc.)

WebSocket support and real-time communication

App - main Fiber instance

Handler - function handling HTTP request/response

Middleware - reusable logic executed before/after handlers

Context - object containing request, response, and utilities

Router - maps HTTP methods and paths to handlers

main.go - application entry point

handlers/ - HTTP handlers

middlewares/ - reusable middleware functions

routes/ - route definitions

templates/ - template files for HTML rendering

Create Fiber app instance

Define routes and route groups

Add middleware for logging, auth, or CORS

Implement handlers to process requests

Start server and test endpoints

Beginner: simple CRUD API

Intermediate: API with middleware and validation

Advanced: real-time app with WebSocket

Expert: microservices with multiple Fiber apps

Enterprise: high-concurrency backend services

Fiber vs Express.js: Fiber is Go-native and faster; Express.js is Node.js-based

Fiber vs ASP.NET Core: Fiber lightweight, Go-based; ASP.NET Core full-featured, C#-based

Fiber vs Gin: Similar performance; Fiber has Express-like API

Fiber vs Echo: Fiber faster for simple APIs; Echo more feature-rich

Fiber vs Laravel: Fiber for Go backend; Laravel is PHP full-stack

2020 - Initial release of Fiber

2021 - Fiber v2 introduces modular API and performance improvements

2022 - Middleware ecosystem expanded, better template support

2023 - Prefork and concurrency optimizations

2025 - Latest Fiber v3 with enhanced routing and WebSocket handling

App - main Fiber instance

Handler - function processing HTTP requests

Middleware - logic executed before/after handlers

Context - object containing request/response

Router - maps paths and methods to handlers